Antifrictional bearing.



PATENTED AUG. 18, 1908.

A. B. CHAPMAN.

ANTIFRIC'TIONAL BEARING.

APPLICATION FILED SEPTJZ, 1907.

lNVENTOR UNITED STATES PATENT ornron.

ABNER B. CHAPMAN, OF TAMPA, FLORIDA, ASSIGNOR OF ONE-THIRD TO EUGENE L. HART,

' OF TAMPA, FLORIDA.

ANTIFRIC TIONAL BEARING.

- useful Improvements in Antifrictional Bearings, of which the following is a specification.

My invention relates to bearings for Wheels, and journal boxes, and has for its objects the provision of a bearing consisting of two sets of rollers mounted in a chamber in the wheel, one set rotating on the axle and having depressions in the middle, while the other set-bears against said depressed middle portions of the first named set. of

rollers and has trunnions extending from their ends that engage annular shoulders on the interiorof the wheel. V

The construction and advantages of my improved bearing will be described herein-' after and illustrated in .the accompanying drawings in,which Fi ure 1 is a cross section of a vehicle whee hub involving my invention and Fig. 2, a section on the line :vac of Eig. 1.

In the-drawings similar reference characters indicate corresponding parts in both v1ews.

A indicates a shaft or axle on which is revolubl mounted the hub B which; is

referabl made intwo parts as shown in ig. '1 he (1 together by any suitable means. The inside of the hub B is formed with a chamber C'to receive the bearings consisting of the rollers D bearing on the shaft or axle A and the rollers E bearing in depressions d in rollers D, said rollers E having trunnions e projecting from their ends that enga e shoulders D on the inside of the hub The ends of the de ressions d are beveled as shown at'd and t e edges of-the rollers-E 'ar'e correspondingly beveled as shown at ,E

to engage the beveled ends d of said de pressions (1, so as to prevent the ends of rollers E and sides of depressions cl from; contasting. The .inneren'ds of the trunnions e where they join the rollers Eare also beveled shown at: 0' to enga e the beveled edge F on the shoulders v F t is construction con Specification of Letters Patent. Application filed September 12, 1907. Serial No. 392,583.

. havin Patented Aug. 18, 1908.

tributing to prevent friction between the ends of the rollers E and the sides of the chamber C. v

It will be understoodfrom the above description and an inspection of the drawings that the hub B is carriedon the trunnions e of rollers E and that the rollers E bear on rollers D which in turn engage the shaft or axle A. The rollers Dand E mutually contribute to space each other apart so that there is no rubbing friction. between the surfaces of the sets of rollers while the beveled portions at the points adjacent to the upright surfaces prevent said upright surfaces engaging each other so that all parts are free to travel on their bearings Without rubbing contact therewith or adjoining surfaces. i

I have shown my device ap lied to the hub of a Wagon Wheel but it W1 1 be understood that-it is equally applicable to other forms of Wheel by altering the construction of the wheel. Without materially changing the construction of the bearings as "above described. Said changes being within the province of a skilled mechanic and thought to be unnecessary to be illustrated.

Having thus described m invention what I claim is 1. A roller bearingoomprising the combination with a shaft or axle, and a bearing box having a chamber therein, of two concentric groups of bearing rollers containedin saidv chamber, one of said groups traveling on the shaft or axle and having an annular depression intermediate of its ends, and the other set of rollers riding in saiddepressions and havin trunnions to engage the interior wall of sai chamber, substantially as shown and described. v 1' x I 2. A roller bearing comprising the combination with a shaft or axle, and a bearing box a chamber therein with annular shoul ers, of two concentric ou' s of bearing rollers contained in said 0 am er, one of sald groups traveling on the shaft orkaxl'e and consisting of rollers havingannular recesses therein intermediate of their ends, the surface of the rollers adjacent to said recesses sees 15 being beveled, the other roup of rollers ridthe trunnions being corres ondingly beveled, 10 ing -1n the recesses in it e first mentioned substentiellyes showman described. greup of rollers and heving beveled edges to In testimony whereof I hereto afiix my engage the beveled portions of the other signature in the presence of two Witnesses.

' group of rollers the rollers in the last men- 1 tion'ed group having 'trunnions extending ABNER CHAPMAN from their ends to engage the annular shoul- Witnesses: ders aforesaid, and the edges of the shoulders A. F. WILSON,

and the last mentioned rollers edjeeent to WADE H. HOWARD. 

